CN116082730B - Irradiation crosslinking type composition containing ECTFE and application thereof - Google Patents
Irradiation crosslinking type composition containing ECTFE and application thereof Download PDFInfo
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- 229920001780 ECTFE Polymers 0.000 title claims abstract description 56
- 239000000203 mixture Substances 0.000 title claims abstract description 38
- 238000004132 cross linking Methods 0.000 title claims abstract description 35
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 39
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 39
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 239000004595 color masterbatch Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 16
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 claims description 2
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 claims description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- -1 TPGDA Chemical compound 0.000 claims description 2
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 claims description 2
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 2
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 claims description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 2
- ZDHCZVWCTKTBRY-UHFFFAOYSA-N omega-Hydroxydodecanoic acid Natural products OCCCCCCCCCCCC(O)=O ZDHCZVWCTKTBRY-UHFFFAOYSA-N 0.000 claims description 2
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 1
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 4
- 235000011613 Pinus brutia Nutrition 0.000 description 4
- 241000018646 Pinus brutia Species 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229920001973 fluoroelastomer Polymers 0.000 description 4
- 229920002313 fluoropolymer Polymers 0.000 description 4
- 239000004811 fluoropolymer Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- CHJAYYWUZLWNSQ-UHFFFAOYSA-N 1-chloro-1,2,2-trifluoroethene;ethene Chemical group C=C.FC(F)=C(F)Cl CHJAYYWUZLWNSQ-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006126 semicrystalline polymer Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0892—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms containing monomers with other atoms than carbon, hydrogen or oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an ECTFE-containing irradiation crosslinking composition, which comprises the following preparation raw materials in parts by mass: 15-50 parts of ECTFE, 50-85 parts of HDPE, 1-5 parts of cross-linking agent, 0.1-2 parts of antioxidant and 0.1-6 parts of color master batch. The irradiation crosslinking type composition containing ECTFE is applied to an insulated cable, and the insulated cable is good in insulating property and excellent in mechanical property.
Description
Technical Field
The invention relates to the technical field of C08L27, in particular to an irradiation crosslinking type composition containing ECTFE and application thereof.
Background
The fluorine material is a special polymer material in the prior art, can still maintain excellent performance under various severe conditions, such as high temperature, saline alkali and other environments, and is widely applied to the fields of use of the highest end of the countries of the military industry, the aerospace and the like, and is used as an insulating core wire material on a cable of a precise instrument. If the X-ETFE is used as an insulated core wire cable on a fighter plane of a free army air force, the cable can be normally used for a long time under severe conditions of high altitude, low air pressure and low temperature and high temperature. However, under the current technical system, the X-ETFE material still has production and processing difficulties. For example, most of military X-ETFE cable materials have a processing temperature of more than 270 ℃ before irradiation, and the processed cables have enough strength, but the elongation is only 80% -100%, and the toughness is insufficient. And the cross-linked fluorine material can only be applied to the field of military industry at present due to technical difficulty and cost, and is difficult to popularize in the civil industry market. Therefore, the irradiation crosslinking material similar to the X-ETFE is searched, the cost and the processing difficulty are reduced, the technology can be further popularized to the civil industrial market, and the product quality is improved.
CN107722514a discloses a radiation crosslinked fluororubber and a preparation method thereof, the raw material components: medium molecular weight fluororubber raw rubber, low molecular weight fluororubber raw rubber, acid scavenger, release agent, filler acid absorber and crosslinking agent. The irradiation crosslinking fluororubber product prepared by the components is applied to the preparation of wire insulation layers and sheath layers, has the characteristics of excellent electrical performance, high and low temperature resistance, oil resistance, difficult aging and self-extinguishing after leaving fire, but lacks toughness, and has complex preparation method and unfriendly environment.
CN109415549B discloses a fluoropolymer composition comprising: at least one semi-crystalline polymer comprising repeating units derived from ethylene and at least one of Chlorotrifluoroethylene (CTFE) and Tetrafluoroethylene (TFE), modified based on the characteristics of a fluoropolymer composition of ETFE or ECTFE, the resulting fluoropolymer composition being useful in cable jackets. However, the modification of ECTFE by the solution disclosed in this patent still has a disadvantage that ECTFE has a lower melting point, and compared with most of ETFE having a melting point exceeding 230 degrees, ECTFE has a melting point of only about 210 degrees, and the flexibility of the molecular chain itself is greater than that of ETFE having the above melting point, and when sheared during processing, the molecular chain is easily disentangled, and has a stronger mobility. Meanwhile, ECTFE has a chain segment capable of performing irradiation crosslinking, so that irradiation crosslinking can be performed, and higher performance is obtained. Irradiation crosslinking modification studies of fluoropolymers for ECTFE are necessary.
Disclosure of Invention
In view of the above problems, the first aspect of the present invention discloses an ECTFE-containing irradiation crosslinking composition comprising, by mass: 15-50 parts of ECTFE (ethylene chlorotrifluoroethylene copolymer) and 50-85 parts of high-density polyethylene.
Preferably, the composition comprises, in parts by mass: 30-40 parts of ECTFE and 60-70 parts of HDPE.
Further preferably, the composition comprises, in parts by mass: 37 parts of ECTFE and 63 parts of HDPE.
In one embodiment, the ECTFE has a melting temperature greater than 200 ℃, say greater than 210 ℃, greater than 230 ℃, greater than 240 ℃, greater than 250 ℃, or from 210 ℃ to 250 ℃. The melting temperature was obtained using DSC test.
Preferably, the ECTFE has a melting temperature of 210-240 ℃.
Other indexes of ECTFE, except the melting temperature, are not limited, and can be selected by those skilled in the art according to actual needs. For example, ECTFE is available from Shenzhen Kesimo technologies Inc., under the trademark Westlake ECTFE Film.
In one embodiment, the HDPE has a melt index of less than 2g/10min.
Preferably, the HDPE has a melt index of 0.1 to 0.9g/10min.
Further preferably, the HDPE has a melt index of 0.2 to 0.5g/10min.
Other indices of HDPE, besides melt index, are not limited and can be selected by one skilled in the art according to actual needs. For example, the HDPE is available from shanghai pine, plasticization technologies, inc: TAISOX, brand HDPE 8001. Alternatively, the HDPE is available from shenzhen Jin plasticization technology limited under the brand name: braskem, brand: PE HT5303.
The melt indices were measured at 190℃and 2.16 kg.
The inventor creatively discovers in a large number of experimental processes that the toughness of the cable can be improved and the dielectric property of the cable can be improved by adding the HDPE material with the melt index smaller than 2g/10min into the composite material. The inventors believe that the possible reasons are: the HDPE with low melt index can provide more crosslinking sites, so that the crosslinking degree of the system is improved, meanwhile, the HDPE is interfered by a fluorine material in the composite material, the crystallinity is reduced, and the HDPE is dispersed in the fluorine material in a form of crystalline state and amorphous state at the same time, wherein the crystalline part can be used as a certain reinforcing component, and the amorphous part can be used as a flexible chain segment, so that the effects of increasing the toughness and improving the crosslinking degree are achieved. And the HDPE has a simple and ordered chemical structure, brings lower dielectric loss tangent, so that the insulation performance is more advantageous than polar materials such as ECTFE and the like. Therefore, HDPE can be added into ECTFE to make up the weakness of insufficient electrical performance caused by the chemical structure.
In one embodiment, the composition preparation raw materials further comprise, in parts by mass: 1-5 parts of cross-linking agent, 0.1-2 parts of antioxidant and 0.1-6 parts of color master batch.
Preferably, the composition further comprises the following preparation raw materials in parts by mass: 2 parts of cross-linking agent, 1 part of antioxidant and 0.1 to 6 parts of color master batch.
In one embodiment, the cross-linking agent is selected from one or more of TAIC, TMPTA, TPGDA, TMPTMA, PETA, PDDA, HDDA.
Preferably, the crosslinking agent is TAIC.
In one embodiment, the antioxidant is selected from one or more of antioxidant 245, antioxidant 168, antioxidant 225, antioxidant 1010, antioxidant 1076.
Preferably, the antioxidant is antioxidant 245.
The invention is not limited to the selection of color concentrates, and the color concentrates can be selected according to actual needs by a person skilled in the art. For example, the color concentrate is available from Dongguan Jin Suyan plastics technology Co., ltd, under the brand 6097.
The second aspect of the invention discloses the use of the ECTFE-containing radiation cross-linking composition for insulated cables.
The preparation method of the insulated cable comprises the following steps:
(1) Adding the combination of the compositions into a high-speed stirrer for mixing to obtain a mixed material;
(2) Adding the mixed material into a parallel double-screw extruder through an extruder for melt extrusion, wherein the temperature of the melt extrusion is 220-245 ℃, drawing, cooling and granulating to obtain blending granules;
(3) Extruding the blend particles through a single screw extruder to form a pipe;
(4) And (3) performing radiation crosslinking on the formed pipe through radiation crosslinking and curing to obtain the insulated cable.
In one embodiment, the irradiation intensity of step (4) is in the range of 12-20MRad.
Preferably, step (4) is 14-16MRad.
Further preferably, step (4) is 15MRad.
The invention controls the processing temperature to ensure that the HDPE with low melt index is not reduced in the processing process, and meanwhile, the HDPE also acts as a diluent, thereby increasing the compatibility of the HDPE and ECTFE and further improving the comprehensive performance of the cable.
The beneficial effects are that:
1. the HDPE is added into ECTFE, the interaction further increases the insulativity of the product, and the product is endowed with good flexibility and maintains certain rigidity.
2. According to the invention, the cross-linking agent is added, so that the ECTFE component is crosslinked by the ethylene chain segment under the action of the cross-linking agent, and the ethylene chain segment in ECTFE can be crosslinked with HDPE, thereby further improving the strength of the product.
3. The invention controls the processing problem, selects HDPE with lower melt index, does not reduce HDPE in the processing process, increases the compatibility of HDPE and ECTFE, and further improves the comprehensive performance of the cable.
Detailed Description
Example 1
The first aspect of this example 1 discloses an ECTFE-containing irradiation crosslinking composition, which is prepared from the following raw materials in parts by mass: 37 parts of ECTFE, 63 parts of HDPE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch.
The ECTFE is available from Shenzhen Kesimo technology Co., ltd., trade name Westlake ECTFE Film.
The HDPE is purchased from shanghai pine and john plasticization technologies, inc: TAISOX, brand HDPE 8001.
The cross-linking agent is TAIC, and the CAS number is 1025-15-6.
The antioxidant is antioxidant 245, and the CAS number is: 36443-68-2.
The color masterbatch is purchased from Dongguan Jin Suyan plastic technology Co., ltd and has the brand number of 6097.
The second aspect of this example 1 discloses the use of the ECTFE-containing irradiation crosslinking composition for insulated cables.
The preparation method of the insulated cable comprises the following steps:
(1) Adding the combination of the compositions into a high-speed stirrer for mixing to obtain a mixed material;
(2) Adding the mixed material into a parallel double-screw extruder through an extruder to perform melt extrusion, wherein the temperature of the melt extrusion is 200-220-220-245-245-245-245, drawing, cooling and granulating to obtain blended granules;
(3) Extruding the blend particles through a single screw extruder to form a pipe; a screw with a diameter of 36mm was used, the aspect ratio was 28, the compression ratio was 2.8, and the pellets were pelletized and then extruded into core wires with a wall thickness of 0.8mm and an outer diameter of 1.5 mm.
(4) And (3) performing radiation crosslinking on the formed pipe through radiation crosslinking curing to obtain the insulated cable, wherein the radiation intensity is 15MRad.
Example 2
The first aspect of this example 2 discloses an ECTFE-containing irradiation crosslinking composition, which is prepared from the following raw materials in parts by mass: 40 parts of ECTFE, 60 parts of HDPE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch.
The ECTFE is available from Shenzhen Kesimo technology Co., ltd., trade name Westlake ECTFE Film.
The HDPE is purchased from shanghai pine and john plasticization technologies, inc: TAISOX, brand HDPE 8001.
The cross-linking agent is TAIC, and the CAS number is 1025-15-6.
The antioxidant is antioxidant 245, and the CAS number is: 36443-68-2.
The color masterbatch is purchased from Dongguan Jin Suyan plastic technology Co., ltd and has the brand number of 6097.
The second aspect of this example 2 discloses the use of the ECTFE-containing irradiation crosslinking composition for insulated cables.
The preparation method of the insulated cable is the same as in example 1.
Example 3
The first aspect of this example 3 discloses an ECTFE-containing irradiation crosslinking composition, which is prepared from the following raw materials in parts by mass: 50 parts of ECTFE, 50 parts of HDPE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch.
The ECTFE is available from Shenzhen Kesimo technology Co., ltd., trade name Westlake ECTFE Film.
The HDPE is purchased from shanghai pine and john plasticization technologies, inc: TAISOX, brand HDPE 8001.
The cross-linking agent is TAIC, and the CAS number is 1025-15-6.
The antioxidant is antioxidant 245, and the CAS number is: 36443-68-2.
The color masterbatch is purchased from Dongguan Jin Suyan plastic technology Co., ltd and has the brand number of 6097.
The second aspect of this example 3 discloses the use of the ECTFE-containing irradiation crosslinking composition for insulated cables.
The preparation method of the insulated cable is the same as in example 1.
Example 4
The first aspect of this example 4 discloses an ECTFE-containing irradiation crosslinking composition, which is prepared from the following raw materials in parts by mass: 50 parts of ECTFE, 50 parts of HDPE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch.
The ECTFE is available from Shenzhen Kesimo technology Co., ltd., trade name Westlake ECTFE Film.
The HDPE is purchased from Shenzhen Jin plasticizing technology Co., ltd, and has the brand name: braskem, brand: PE HT5303.
The cross-linking agent is TAIC, and the CAS number is 1025-15-6.
The antioxidant is antioxidant 245, and the CAS number is: 36443-68-2.
The color masterbatch is purchased from Dongguan Jin Suyan plastic technology Co., ltd and has the brand number of 6097.
The second aspect of this example 4 discloses the use of the ECTFE-containing irradiation crosslinking composition for insulated cables.
The preparation method of the insulated cable is the same as in example 1.
Comparative example 1
The irradiation crosslinking type composition comprises the following preparation raw materials in parts by mass: 100 parts of ECTFE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch, and the rest is the same as in example 1.
Comparative example 2
The preparation raw materials by mass portion are: 70 parts of ECTFE, 30 parts of HDPE, 2 parts of cross-linking agent, 1 part of antioxidant and 3 parts of color masterbatch, and the rest is the same as in the example 1.
Performance test:
1. mechanical property test: according to GB/T2651.1, the tensile strength and elongation at break of the strands before and after irradiation crosslinking are tested, see Table 1 below.
2. Crosslinking degree test: the degree of crosslinking of the wire according to the GJB 17.6 test, the compliance standard is denoted as PASS, otherwise denoted as NG, see Table 2 below.
3. Dielectric loss tangent of the pellet: according to GB/T3048.5, table 2 below.
4. Wire immersion voltage test: according to GJB 17.6, PASS is satisfied if no breakdown occurs, otherwise NG is noted, see table 2 below.
TABLE 1
TABLE 2
| Immersion voltage test | Loss tangent | Crosslinking degree test | |
| Example 1 | PASS | 3.6×10 -4 | PASS |
| Example 2 | PASS | 2.5×10 -4 | PASS |
| Example 3 | PASS | 3.9×10 -4 | PASS |
| Example 4 | PASS | 2.7×10 -4 | PASS |
| Comparative example 1 | NG | 6.8×10 -4 | PASS |
| Comparative example 2 | PASS | 3.4×10 -4 | PASS |
Claims (6)
1. An ECTFE-containing irradiation crosslinking composition, characterized in that the composition preparation raw materials include, in parts by mass: 30-40 parts of ECTFE and 60-70 parts of HDPE;
the preparation raw materials of the composition also comprise: 1-5 parts of cross-linking agent, 0.1-2 parts of antioxidant and 0.1-6 parts of color master batch;
the HDPE has a melt index of less than 2g/10min, wherein the melt index is measured at 190 ℃ under 2.16 kg;
the cross-linking agent is selected from one or more of TMPTA, TPGDA, TMPTMA, PETA, PDDA, HDDA;
the antioxidant is one or more selected from antioxidant 245, antioxidant 168, antioxidant 225, antioxidant 1010 and antioxidant 1076.
2. The composition of claim 1 wherein the ECTFE has a melting temperature greater than 200 ℃.
3. Use of the composition according to claim 1, characterized in that the ECTFE-containing radiation cross-linked composition is applied to insulated cables.
4. Use of a composition according to claim 3, characterized in that the preparation method of the insulated cable comprises the following steps:
(1) Mixing and stirring the composition to obtain a mixed material;
(2) Adding the mixed materials into a parallel double-screw extruder through an extruder to perform melt extrusion, drawing, cooling and granulating to obtain blended granules;
(3) Extruding the blend particles through a single screw extruder to form a pipe;
(4) And (3) performing radiation crosslinking on the formed pipe through radiation crosslinking and curing to obtain the insulated cable.
5. The use of the composition according to claim 4, wherein the melting temperature of step (2) is 220-245 ℃.
6. The use of the composition according to claim 5, wherein the irradiation intensity of step (4) is 12-20MRad.
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| GB1569460A (en) * | 1976-10-08 | 1980-06-18 | Int Standard Electric Corp | Insulated electrical conductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11084922B2 (en) * | 2016-04-19 | 2021-08-10 | Solvay Specialty Polymers Italy S.P.A. | Fluoropolymer composition |
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| GB1569460A (en) * | 1976-10-08 | 1980-06-18 | Int Standard Electric Corp | Insulated electrical conductor |
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